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No exploitation reportedFix available

CVE-2019-5747

No exploitation reported by the sources we read.

  • Published2019-01-09
  • WeaknessCWE-125

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

An issue was discovered in BusyBox through 1.30.0. An out of bounds read in udhcp components (consumed by the DHCP client, server, and/or relay) might allow a remote attacker to leak sensitive information from the stack by sending a crafted DHCP message. This is related to assurance of a 4-byte length when decoding DHCP_SUBNET. NOTE: this issue exists because of an incomplete fix for CVE-2018-20679.

Timeline

dates in UTC
  1. 2019-01-0916:29CVE publishedNVD

Versions per branch

NVD
Busybox
BranchAffectedFixed in
1.30≤ 1.30.0no fix published
Canonical ubuntu linux
BranchAffectedFixed in
14.4= 14.04no fix published
16.4= 16.04no fix published
18.4= 18.04no fix published
18.10= 18.10no fix published

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • busyboxUbuntu:18.04:LTSall versions · fixed in 1:1.27.2-2ubuntu3.2
  • busyboxUbuntu:16.04:LTSall versions · fixed in 1:1.22.0-15ubuntu1.4
  • busyboxUbuntu:14.04:LTSall versions · fixed in 1:1.21.0-1ubuntu1.4
  • busyboxTuxCare:OracleLinux:6all versions · fixed in 1:1.15.1-21.el6_6.tuxcare.els3and 1 other package
  • busyboxTuxCare:CentOS:6all versions · fixed in 1:1.15.1-21.el6_6.tuxcare.els3and 1 other package
  • busyboxSUSE:OpenStack Cloud Crowbar 9all versions · fixed in 1.35.0-4.3.1
  • busyboxSUSE:OpenStack Cloud 9all versions · fixed in 1.35.0-4.3.1
  • busyboxSUSE:Manager Server 4.1all versions · fixed in 1.34.1-4.9.1

52 more package ranges on OSV.dev

Vendor advisories

  • CVE-2019-5747 Red Hat Product Security

    busybox: Out of bounds read in udhcp components resulting in information disclosure

Full record on NVD

Fix

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Published
2019-01-09
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-h49r-cwwr-2hv6

Frequently asked questions

What is CVE-2019-5747?

An issue was discovered in BusyBox through 1.30.0. An out of bounds read in udhcp components (consumed by the DHCP client, server, and/or relay) might allow a remote attacker to leak sensitive information from the stack by sending a crafted DHCP message. This is related to assurance of a 4-byte length when decoding DHCP_SUBNET. NOTE: this issue exists because of an incomplete fix for CVE-2018-20679.

Is CVE-2019-5747 actively exploited?

Active exploitation of CVE-2019-5747 has not been confirmed. Its EPSS score was 4.7% on 2026-11-08, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2019-5747?

CVE-2019-5747 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

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